Mailbox



FIG. 1 is a front perspective view of a mailbox showing my new design;

FIG. 2 is a front view;

FIG. 3 is a top view;

FIG. 4 is a bottom view;

FIG. 5 is a right side view;

FIG. 6 is a rear side view; and,

FIG. 7 is a left side view thereof.

The broken line showing of the support in FIGS. 1,2,4,5,6,7 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a mailbox, as shown and described. 